[wasm] Trim graph before scheduling.

test/cctest/wasm/test-run-wasm.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
 
 #include "src/base/platform/elapsed-timer.h"
 #include "src/utils.h"
@@ skipping 61 matching lines @@
 WASM_EXEC_TEST(Int32Const_many) {
   FOR_INT32_INPUTS(i) {
     WasmRunner<int32_t> r(execution_mode);
     const int32_t kExpectedValue = *i;
     // return(kExpectedValue)
     BUILD(r, WASM_I32V(kExpectedValue));
     CHECK_EQ(kExpectedValue, r.Call());
   }
 }
 
+WASM_EXEC_TEST(GraphTrimming) {
+  // This WebAssembly code requires graph trimming in the TurboFan compiler.
+  WasmRunner<int32_t> r(execution_mode, MachineType::Int32());
+  BUILD(r, kExprGetLocal, 0, kExprGetLocal, 0, kExprGetLocal, 0, kExprI32RemS,
+        kExprI32Eq, kExprGetLocal, 0, kExprI32DivS, kExprUnreachable);
+  r.Call(1);
+}
+
 WASM_EXEC_TEST(Int32Param0) {
   WasmRunner<int32_t> r(execution_mode, MachineType::Int32());
   // return(local[0])
   BUILD(r, WASM_GET_LOCAL(0));
   FOR_INT32_INPUTS(i) { CHECK_EQ(*i, r.Call(*i)); }
 }
 
 WASM_EXEC_TEST(Int32Param0_fallthru) {
   WasmRunner<int32_t> r(execution_mode, MachineType::Int32());
   // local[0]
@@ skipping 2816 matching lines @@
   BUILD(r, WASM_I32_REMS(WASM_GET_LOCAL(0), WASM_GET_LOCAL(1)), WASM_DROP,
         WASM_ZERO);
   const int32_t kMin = std::numeric_limits<int32_t>::min();
   CHECK_EQ(0, r.Call(133, 100));
   CHECK_EQ(0, r.Call(kMin, -1));
   CHECK_EQ(0, r.Call(0, 1));
   CHECK_TRAP(r.Call(100, 0));
   CHECK_TRAP(r.Call(-1001, 0));
   CHECK_TRAP(r.Call(kMin, 0));
 }